US 2019/0135222 A1Published application

Gas generator

AssigneeDaicel Corporation

InventorsMasato HIROOKA, Koji YAMAMOTO

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Abstract

The present invention provides a gas generator, including an outer shell housing having a top plate, a bottom plate and a circumferential wall provided with a gas discharge port, a combustion chamber accommodating a gas generating agent, a cylindrical filter and an ignition device disposed in a cup-shaped ignition device chamber housing, the bottom surface of the cup-shaped ignition device chamber housing facing the top plate and an end surface of the opening thereof abutting against the bottom plate, a length from an upper end surface to a lower end surface of the cylindrical filter being shorter than a distance from the top plate to the bottom plate of the outer shell housing, and the cylindrical filter being disposed such that the upper end surface faces the top plate and the lower end surface faces the combustion chamber, a cup-shaped cover member which has a bottom surface, a circumferential wall and an opening, further being disposed between the cup-shaped ignition device chamber housing and the cylindrical filter, an outer circumferential surface of the circumferential wall of the cover member abutting against an inner circumferential surface of the cylindrical filter, the bottom surface of the ignition device chamber housing being covered, from outside, by the bottom surface of the cover member, and a gap being formed between an inner circumferential surface of the circumferential wall of the cover member and an outer circumferential surface of the circumferential wall of the ignition device chamber housing.

Claims7

Dependent claims

A gas generator, comprising:

an outer shell housing having a top plate, a bottom plate and a circumferential wall provided with a gas discharge port;
in the outer shell housing, a combustion chamber accommodating a gas generating agent, a cylindrical filter, and an ignition device disposed in a cup-shaped ignition device chamber housing;
the combustion chamber being a space inside the outer shell housing excluding the cup-shaped ignition device chamber housing and the cylindrical filter;
the cup-shaped ignition device chamber housing having a bottom surface, a circumferential wall and an opening and being disposed such that the bottom surface thereof faces the top plate of the outer shell housing and an end surface of the opening thereof abuts against the bottom plate of the outer shell housing;
a length from an upper end surface to a lower end surface of the cylindrical filter being shorter than a distance from the top plate to the bottom plate of the outer shell housing, and the cylindrical filter being disposed along a central axis of the outer shell housing such that the upper end surface faces the top plate and the lower end surface faces the combustion chamber;
a cup-shaped cover member being further disposed between the cup-shaped ignition device chamber housing and the cylindrical filter;
the cup-shaped cover member having a bottom surface, a circumferential wall and an opening;
and
the ignition device chamber housing, the cylindrical filter, and the cup-shaped cover member being disposed such that
an outer circumferential surface of the circumferential wall of the cover member abuts against an inner circumferential surface of the cylindrical filter,
the bottom surface of the ignition device chamber housing is covered, from outside, by the bottom surface of the cover member, and
a gap is formed between an inner circumferential surface of the circumferential wall of the cover member and an outer circumferential surface of the circumferential wall of the ignition device chamber housing.

9 more elements

A gas generator, comprising:

an outer shell housing having a top plate, a bottom plate and a circumferential wall provided with a gas discharge port;
in the outer shell housing, a combustion chamber accommodating a gas generating agent, a cylindrical filter, and an ignition device disposed in a cup-shaped ignition device chamber housing;
the cup-shaped ignition device chamber housing having a bottom surface, a circumferential wall and an opening and being disposed such that the bottom surface thereof faces the top plate of the outer shell housing and an end surface of the opening thereof abuts against the bottom plate of the outer shell housing;
a length from an upper end surface to a lower end surface of the cylindrical filter being shorter than a distance from the top plate to the bottom plate of the outer shell housing, and the cylindrical filter being disposed along a central axis of the outer shell housing such that the upper end surface faces the top plate and the lower end surface faces the combustion chamber;
and
a disk-shaped cover member further being disposed, and the disk-shaped cover member being disposed so as to abut against the upper end surface of the cylindrical filter and face the top plate of the outer shell housing.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/093,325Filed 21 Apr 2017
Priority: JP 2016-09922118 May 2016
Published: 9 May 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

B60R 21/264
Characterised by the inflation fluid source or means to control inflation fluid flow: using instantaneous generation of gas, e.g. pyrotechnic
B60R 21/261
Characterised by the inflation fluid source or means to control inflation fluid flow: with means other than bag structure to diffuse or guide…
B60R 21/2644
Using instantaneous generation of gas, e.g. pyrotechnic: using only solid reacting substances, e.g. pellets, powder
B60R 21/272
Using instantaneous release of stored pressurised gas: with means for increasing the pressure of the gas just before or during liberation, e.g.…